<!DOCTYPE html>
<html>
<body>

<?php
ECHO "hello world!<br>";
echo "hello world!<br>";
EcHo "hello world!<br>";

$color="red";
echo "my car is " . $color . "<br>";
echo "my house is " . $COLOR . "<br>";
echo "my boat is " .$Color . "<br>";
?>

</body>
</html>